/*
    libnbds
    Non-blocking Data Structures Library

    Copyright (C) 2011 Paweł Dziepak

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "atomic.h"
#include "ref_ptr.h"

using namespace nbds;

ref_ptr_base::ref_ptr_base(void *p) : ptr(p), ref_count(new int) {
	*ref_count = 1;
}

ref_ptr_base::ref_ptr_base(void *p, int *rc) {
	init(p, rc);
}

void ref_ptr_base::init(void *p, int *rc) {
	ptr = p;
	ref_count = rc;
	arch::ftch_and_add(ref_count, 1);
}

bool ref_ptr_base::remove() {
	bool do_remove = arch::ftch_and_add(ref_count, -1) == 1;
	if (do_remove)
		delete ref_count;
	return do_remove;
}
